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Tough Next Number Sequence

Tough next number sequence - 27 November

Find the next number in the sequence

23 21 24 19 26 15 28 11 30 7 36 ?

For Solution : Click Here

15 comments:

  1. 5, alternating addition and subtraction of prime numbers.

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  2. This comment has been removed by the author.

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  3. how the fuk could u find -1 ???

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  4. 23 21 24 19 26 15 28 11 30 7 36 5
    -2 +3 -5 +7 -11 +13 -17 +19 -23 +29 -31

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  5. jibin sam philip
    another answer is -5
    what about this logic?
    23 1=24
    21-2=19
    now multiply the added/subtracted no.by 2
    24 2=26
    19-4=15
    26 2=28
    15-4=11
    28 2=30
    11-4=7
    after doing it for 3times take the sum of the added/subtracted no.,i.e.(2 2 2=6)&&(4 4 4=12)
    now add/subtract that with theprevious no.
    30 6=36&&7-12=-5


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    Replies
    1. Even I thought in this way and got an answer as -5. But its not correct. This will not grow the series in any good way...

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